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Finding the Fourth Proportional to 624.78, 936.45 and 552.78

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Solution

The fourth proportional to 624.78, 936.45 and 552.78 is: 828.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.78 : 936.45 = 552.78 : x
  2. Step 2: Convert to fraction form
    624.78/936.45 = 552.78/x
  3. Step 3: Cross multiply
    624.78x = 936.45 × 552.78
  4. Step 4: Simplify right side
    624.78x = 517,650.83
  5. Step 5: Solve for x
    x = 517,650.83/624.78
  6. Step 6: Final answer
    x = 828.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.